30 October 2017
I’m sure we have all heard of the brilliant scientist Isaac Newton who is famous for his law of gravitation, which was a one of the many brilliant discoveries in the scientific revolution in the 17th century. His law of gravitation was everything in the universe is in some way attracted to each other. We will be looking at Newton’s three laws, videos demonstrating them, explaining why the specific law is demonstrated in the video, and maybe why the law may not exactly apply to the example if it does not.
Newton’s Third Law
Newton’s Third Law put in brief terms is: every action has a reaction. In this video a tennis ball falls off of a table and bounces back up into the air. The ball falling off of the table is the action, the ball bouncing back up is the reaction.
Newton’s Second Law
Newton’s Second Law summed up is the acceleration on an object correlates to the magnitude of force put behind it to put it in motion and mass of the object. In the video there is a softball and a tennis ball both with around the same mass. The softball is flicked and it goes forwards some distance, The tennis ball is then thrown across the ground with more force and it also goes forward some distance. the Tennis ball had more acceleration because it had more force even though it had the same mass therefore the magnitude of force is proportional to the acceleration of the object. However if we were to change the type of material to maybe a 1 lbs rock ball and a 1 lbs paper ball, the acceleration may not be the same due to paper being effected more in an environment with air resistance.
Newton’s First Law
Newton’s first Law, or the Law of Inertia, is when an object that is at rest stays at rest, and an object that is being moved by a force stays moving unless there is an opposing force to stop it. In this video you can see that at first there is a tennis ball that is not moving, it is not moving because an object that is at rest must stay at rest unless a force acts on it. When the ball is pushed it rolls until eventually stopping. But Newton’s first Law states that an object in motion must stay in motion, why does the ball stop if Newton is right? The ball would only have kept moving constantly if there were no opposing forced acting on it. Since the ball was rolling on the floor, the wood caused a force of friction that made the ball come to a stop.